An AC-DC five-degree-of-freedom dual-spherical hybrid magnetic bearing for a vehicle-mounted flywheel battery

Abstract

Provided is an alternating-current and direct-current five-degree-of-freedom hybrid magnetic bearing having dual spherical surfaces for a vehicle-mounted flywheel battery; a radial stator consists of upper and lower radial stators (1, 8) arranged coaxially and having integrally connected yokes; three radial stator poles (11, 12, 13, 81, 82, 83) are arranged along the circumferential direction of each of the upper end of the yoke of the upper radial stator (1) and the lower end of the yoke of the lower radial stator (8); the inner surface of each radial stator pole (11, 12, 13, 81, 82, 83) is a concave spherical surface (211, 811); the upper and lower ends of the intermediate cylinder (73) of a rotor (7) are an upper connection body (72) connected to an upper-end cylindrical body (71) and a lower connection body (75) connected to a lower-end cylindrical body (74), respectively; the side walls of the upper and lower cylindrical bodies (71, 75) are convex spherical surfaces (711, 751); each concave spherical surface (211, 811) correspondingly faces, at its top and bottom, a convex spherical surface (711, 751); an axial stator (5) is nested outside the intermediate cylinder (73); the upper side of an upper axial stator (51) and the lower side of the lower axial stator (52) are each equipped with annular permanent magnets (31, 32); the opposing faces of the upper and lower radial stators (1, 8) and the rotor (7) are spherical structures, eliminating a gyroscopic effect; when the rotor (7) of the magnetic bearing deflects or deviates, the electromagnetic force points to the spherical center of the rotor (7), thus reducing the disturbance torque generated on the rotor (7) by the stator magnetic poles.

Description

technical field [0001] The invention relates to a non-mechanical contact magnetic suspension bearing, in particular to an AC / DC five-degree-of-freedom hybrid magnetic bearing, which is suitable for the magnetic suspension support of a vehicle-mounted flywheel battery of an electric vehicle. Background technique [0002] At present, the main problem restricting the development of electric vehicles is the performance of vehicle power batteries. The vehicle flywheel battery uses the magnetic levitation support and the rotational inertia of the flywheel to realize energy storage, which has the advantages of high charging efficiency, high specific power, small mass, no pollution and long life. Existing flywheel batteries usually use electromagnetic-permanent magnetic hybrid magnetic bearings as the support of the flywheel rotor to achieve suspension with five degrees of freedom in the radial and axial directions. The stator of this hybrid magnetic bearing is a cylindrical struct...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problems of the existing magnetic bearings for flywheel batteries, such as the heavier weight of the rotor and the tendency to produce gyro effects, and to propose an AC / DC motor for vehicle flywheel batteries that has a compact structure, small volume, light weight, and can suppress the gyro effect. Five degrees of freedom double spherical hybrid magnetic bearing

Images